Flexible coupling.



R, H. ALDRICH.

FLESLE COUPUNG. 'APPLmAmN FILED 1uNE29. 1911.

l, y Bwtented Apr. 30, 1918I l mman/ms i Ilm were. earner ernten.

NIDSCOE HILTUN ALDRICI-I, F ALLEN'IOWN, PENNSYLVANIA, ASSIGNOR T0 THE ALDRICH PUMP COMPANY, 0F ALLENTOWN, PENNSYLVANIA, A CORPORA- FLEXIBLE conrmne. j

A Speciication of Letters Patent. Patmtdl Apr'.

application med June ze, 1917. serial No. 177,676.

To all whom t may concern:

Be it known -that I, Roscoe H. ALDRICH, a citizen of the United States, and a resident of Allentown, in the county of Lehigh and State of Pennsylvania, have invented a new and Improved Flexible Coupling, of which the following is a full, clear, and exact description.

My invention relates to flexible couplings, and has reference more particularly to the buers of.. the coupling.

An object of the invention is to provide asimple, inexpensive and detachable bu'er in the shape ofa helical spring .adapted to bear at the ends and in the central part;

With the above and other objects inview, the nature of which will more fully appear as the description proceeds, the invention consists in the novel construction, combination and arrangement of parts as herein fully described, illustrated and claimed.

In the accompanying drawings, forming part of the application, similar' characters' of reference indicate corresponding parts in both views. v

Figure 1 is an axial section of a exible coupling provided with an embodiment of my invention; and j Fig. 2 is a face elevation of the'coupling,

oneiof the bolts being broken away to show the helical spring.

Referring to the drawings, 3 is the driving shaft with which a coupling member 4c is Vconstrained to revolve. A. series of pins or bolts ,5 'are rigidly secured to the mem-V ber Il. 'Ihese members are disposed symmetrically and project through corresponding apertures 6 1n a coperating coupling member Z constrained torevolve with the driven shaft 8. Each of the pins carries a helical spring 9 which is wider at the ends thanv in the middle. It is really a 'double conical springl converging toward the middie part of the spring. 'The inner diameter of the central part is substantially equalA to thediameter of a pin 5, so as to bear' there# on. The ends of the spring fit snugly into a shell 10' which :is set into a corresponding aperture 6 ofthe coupling member 7. @ne

end of the spring abuts against the face of 'the coupling member 4, and the other,

against a disk 1l retained at the shell 10 by the head 12 of the pin 5.

By providing a double, conical helical spring which converges toward the middle I ao, raie?. l

obtain a -highly 'yieldingV buffer, the ef ciency of which is particularly appreciable 1n the rotary direction, due to the bearings provided for the ends and central part of the spring, as previously mentioned. .The springs' can be easily removed and adjusted without taking Aapart or separating the coupling members.

I claim: U Y

1. In a flexible coupling, a resilient buffer in .the shape of a double, conical helical spring converging toward the middle.-

2. In a iexible coupling, a buffer in the shape of a helical spring having itsminimum diameter between the ends thereof.

v 3. In a Hexible coupling, a driving member, a driven member, pins extending from the driving through the driven member, al helical spring having its minimum diameter between its ends for each of thepins, each of theJ springs bearing on the correspond@ ing pm at its minimum diameter, and means. in the driven member Jfor engaging the ends yof the spring;

4a In a flexible coupling, a driving member, a driven member, pins rigidly ksecured to the driving member projecting throughV pins for retaining one end of the spring against the driving member and the other against the washer.

5. In a flexible coupling, al driving memi b er, a driven member, tubular shells carried by the driven member, pins carried by the driving member projecting through the shells, helical springs of .varying dlameter `in said shells about said pins, said helical springs having abearing on the pins at their minimum diameter and in the shells 'itt at their maximum diameter, and means associated with the pins for retaining the springs in the shells.

K 6. In a flexible coupling, a driving mem- 5 ber, a driven member, pins extending from the driving to the driven member, helical springs of varying diameter each having a bearing on a corresponding pin, and means for housing the springs in the driven mein- *ber in Which said helical'springs also have a 10 bearing.

7. In a flexible coupling, a resilient buffer in the shape of a helical spring of varying diameter.

ROSCOE HILTON ALDRICH. 

